如何让我的背景每 15 秒自动更改一次图像？JavaScript？jQuery？
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How do I make my background change images automatically every 15 seconds? JavaScript? jQuery?
提问by Fab
I know this sounds simple and I searched up and down the web for a script but cant find anything. I just want my backgrounds to change every 15 seconds or so automatically. (like a photo slide show but as a background.) My style sheet is controls the bg image in the body tag. Thanks for the help.
我知道这听起来很简单，我在网上上下搜索了一个脚本，但找不到任何东西。我只希望我的背景每 15 秒左右自动更改一次。（就像照片幻灯片，但作为背景。）我的样式表控制 body 标签中的 bg 图像。谢谢您的帮助。
回答by phihag
With setInterval, you can call an arbitrary function in, well, intervals:
使用setInterval，您可以在时间间隔内调用任意函数：
(function() {
var curImgId = 0;
var numberOfImages = 42; // Change this to the number of background images
window.setInterval(function() {
$('body').css('background-image','url(/background' + curImgId + '.jpg)');
curImgId = (curImgId + 1) % numberOfImages;
}, 15 * 1000);
})();
回答by Kon
Simple enough to do with setInterval:
使用setInterval 很简单：
var currentIndex = 1;
var totalCount = 21;
setInterval(function() {
if (currentIndex > totalCount)
currentIndex = 1;
$(body).css('background-image', 'url(/bg' + currentIndex++ + '.jpg)');
}, 15000);
回答by user2676376
<script src="http://codeorigin.jquery.com/jquery-2.0.3.min.js"></script>
<script style="text/javascript">
(function () {
var curImgId = 0;
var numberOfImages = 5; // Change this to the number of background images
window.setInterval(function() {
$('body').css('background','url("'+ curImgId +'.jpg")');// set the image path here
curImgId = (curImgId + 1) % numberOfImages;
}, 15 * 1000);
})();
</script>
